[issue20628] Improve doc for csv.DictReader 'fieldnames' parameter

[Sean Rodman]

Sean Rodman added the comment:

Is there anything else that should be added to this patch? I don't mean to bug you guys just want to make sure that everything is right with it so that if and or when it is applied it will apply without any problems. Also, if there is anything else I should change I am definitely open to changing anything that is needed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20628>
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